I’d like to spend some time now covering how I’m punching the hole for the handle. I was pretty sure that I was going to use my mortiser machine, but I didn’t have the appropriate bit when I was working on the model. I just went with the time-tested method of a forsner bit and a sharp chisel, but I knew this was not a sustainable way to batch them out. After spending what seemed like WAY too long finding the right mortiser bit I started to think about how to make the drill press/chisel method more efficient.
Quick aside on the search for a bit
I have an older Delta benchtop mortiser that only accepts 5/8in shaft bit. Turns out that most bits are not 5/8. In addition, I also wanted to get a more middle of the road bit when it comes to quality. Amazon has sooo many different choices but when you are looking for anything over ½ in the pickings get slim. Either they were of extremely questionable quality or didn’t have the right size shaft. I was originally looking for 3/4 in but when the search wasn’t going my way so I started looking at 5/8in. I finally found one from Woodline, with the right size shaft, for about $25. I can’t say I’m impressed with the quality but after lots of sharpening, it's serviceable. Sharpening the inside of a bit over ½ is really a pain. The little diamond cones don’t fit! This whole story explains why I need to figure out if and how to get a 4 shouldered tenon on the handle.
To get back on track, let's talk about my failed attempt at a jig for finished the mortise. The ideas is to come up with a way to punch the hole without having to lay it out. For my first attempt, I tacked a few cleats onto a piece of plywood to hold the side in place while I squared up the hole from the forsner bit. Then I fastened a piece of oak over the cleats and with a nice square guide hole directly above the hole in the handle. My thinking was that I could use the oak board to help guide my chisel and shave some time off the process. It didn’t work out well enough. I’d likely be easier just to do it without the guide. I had already taken the guide apart so the picture is just a mock-up to give the idea.
I think I will at least be able to salvage the plywood and cleats setup to use on the mortiser. I’ll just fasten it down to the table of the machine and center it under the bit. This is what I envisioned from the start but it took longer than I'd have liked to finally get here. And let me say this, Using this mortiser for 5/8in holes is no treat. Even after tuning up the chisel and bit, you really have to pull on that handle.
Next up I'll cover what I came up with for the notches on the sides and the carrier for the router table.